• src/MyYuCode/: ASP.NET Core Web API (net10.0) with EF Core (SQLite).
  • Api/: minimal API endpoint mappings (see ApiEndpoints.cs).
  • Controllers/: REST controllers.
  • Data/: MyYuCodeDbContext and entity models.
  • Contracts/ and Services/: shared DTOs and business logic.
• web/: Vite + React + TypeScript UI.
  • web/src/: app code; the @/ alias maps here.
  • web/public/: static assets; build output in web/dist/.
• MyYuCode.slnx: solution referencing the backend project.

Backend:

• dotnet build src/MyYuCode/MyYuCode.csproj — compile the API.
• dotnet run --project src/MyYuCode/MyYuCode.csproj --launch-profile http — run on http://localhost:9110 (use --launch-profile https for https://localhost:9111).

Frontend (from web/):

• npm ci — install dependencies (uses package-lock.json).
• npm run dev — start Vite dev server.
• npm run build — typecheck and build to web/dist/.
• npm run lint — run ESLint.

• C#: 4-space indentation; nullable reference types are enabled—avoid introducing new warnings. Use PascalCase for types/methods and camelCase for locals/parameters.
• Frontend: components in PascalCase.tsx, hooks in useX.ts. Prefer importing via @/… when applicable.
• Formatting: no repo-wide formatter is enforced; keep diffs focused and run lint before opening a PR.

• Automated tests are not set up yet (no *.Tests.csproj or JS test runner). If adding tests, place them under tests/ and ensure dotnet test runs.

• Git history is empty; use a consistent convention going forward (e.g., Conventional Commits: feat: …, fix: …, chore: …).
• PRs should include a short summary, testing notes (commands run), and screenshots for UI changes. Avoid committing build artifacts (bin/, obj/, web/dist/, web/node_modules/).

• The API creates a local SQLite database at LocalApplicationData/myyucode/myyucode.sqlite; delete it to reset local state.
• Environment-specific settings live in src/MyYuCode/appsettings*.json.